Earthworm-Morphology
Chapter Name : Structural Organization In Animals |
Sub Topic Code : 103_11_07_03_01 |
Topic Name : Earthworm-Morphology |
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Sub Topic Name : Morphology |
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Introduction
Earthworm - reddish brown terrestrial invertebrate that inhabits the upper layer of the moist soil. The common Indian earthworms are Pheretima and Lumbricus.
Pre-Requisites:
To understand the morphology of an earthworm.
Activity:
Videos, describing morphology of earthworm.
Real Life Question:
Are earthworms helpful to man?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Body of earthworm | long cylindrical body, divided into more than hundred short segments which are similar. |
| Prostomium | a lobe which serves as a covering for the mouth and as a wedge to force open cracks in the soil into which the earthworm may crawl. It is sensory in function. |
| Clitelium | 14-16 segments are covered by a prominent dark band of glandular tissue |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|
Real life uses :
Earthworms help in making the soil fertile.
Practical examples around us
| Examples | Explainations |
|---|---|
| Earthworms | They are commonly found in our gardens. |
What you learn in Theory:
Morphology of earthworm.
What you learn in Practice:
How earthworms are helpful.